Red azo dye.



means of hydrochloric acid and 7 parts of UNITED STATES PATENT OFFICE.

JOHANNES JANSEN AND WILHELM NEELMEIER, OF LEVERKUSEN; NEAR COLOGNE, GERMANY, ASSIGNORlS TO FARBENFA'BRIKEN VORM. FRIEDR. BAYER. 85 00., OF ELBEBFELD, GERMANY"(A CORPORATION OF GERMANY.

RED A'zo DYE.

No Drawing.

To all whom it may concern: i

Be it known that we, JOHANXES JANSEN and \VILHELM NEELMEIER, doctors of philosophy, chemists, citizens of the German Empire, residing at Leverkusen, near Col logne, Germany, have invented new and useful Improvements in Re Azo Dyes, of t which the following is a specification. v

Our invention relates to the manufacture and production of new coloring matters capable of dyeing on a mordant.

T he new dyestutl's are obtained by combining the diazo compounds of ortho-aminophenol sulionic acids with 1.3-dioxyquinolin.

The new d yestull's are dark powders solu ble in water generally with a red to bluish red color and soluble in concentrated sulfuric acid generally with from an orange to red color. They yield upon reduction with stannous chlorid and hydrochloric acid, an orthc aminophcnol sulfonic acid and LI dioxy-Q aminorpiinolin.

The new dyes produce on wool yellow to red shades which turn red to bordcaux by chroming, shadesfast to light and to fulling are thus-obtained.

in carrying out our new process practically, we can proceed as follows,the parts be ing" by weight :-18..) parts of Z-aminophcnolr-sultonic acid are diazotized by sodium nitrite. The diazo compound is then added to an aqueous solution, which has to be stirred, until the combination is finished, of 20.5 parts of the disodium salt of 1.3-dioxytpiinolin in an excess of sodium earbon ate. The dyestull' is isolated in the usual way, filtered olt, pressed and dried. It is a l'(tl(llSll-l)l't')\\'li powder which is soluble in water with a red and which is soluble in concentrated sulluric acid with an orange color. By reduction with stannous chlorid and bydrochloric acid 2 aininophenol 4t sulfonic i acid and l.3-dioXy-Q-aminoquinolin are obi Specification of Letters Patent.

Application filed February 26, 1910.

Patented J line 14, 1910.

Serial No. 546,042.

tained. It dyes wool yellowish-brmvn turning' red by chroming.

The process is carried out in an analogous manner on starting from other of the above mentioned ortho-aniinopheiml sulfonic acids, such as tS-chloro-2-aminoplmi10l+-sulfonic acid, 4-chloro-2-aminophenol-(J-sultonic acid, G-nitro-Q-aminopheuol-4-sulfonic acid, 3- a1ninophenol-t3-sulfo-Q-carboxylic acid etc.

'0 claim:

1. The herein-described new azo dyestuffs, obtainable from 1)l'tl10-ZlllilllOPlltllOl sull'onic acids and l.3-dioxyquinolir. which dyestull's arc, after being dried and pulverized. dark powders soluble in water generally with a red to bluish-red color. soluble in concentrated sulfuric acid generally with an orange to red color; yielding upon reduction with stanuous chlorid and hydrochloric acid, an ortho-amiuopheuolsull'onic acid and 1.3-di oXy-Q-aminoquinoliu; and dyeing wool from yellow to red shades turning red to bordeaux by chroming, substantially as described.

2. The bcrein-described new azo dyestutf, obtainable from 2-aniinophenol--'l-sultonic acid and l.ii-tlioxyqilinolin, which dyestufiRvO is, after being dried and pulverized, a reddish-brown powder solubl in water with a red color and soluble in ctmcentratedsulluric acid with an orange color; yielding upon reduction with slannous chlorid and hydrochloric acid 2an1iuophenolt-sultonic acid and l.ii-tlioXy-Q'aminoquinolin; and dyeing wool yellowish-brown turning red by chroming, substantiallyas dost-Tibial.

In testimony whercol we have hereunto 80 set our hands in the presence of lwo sub' scribing witnesses.

Witnesses:

()T'ro K6 11;, thus. J. Wluou'r. 

